Thill-coupling



(No Model.)

0. O. MUNROE.

I THILL COUPLING. No. 405,108. Patented June 11, 1889.

UNITED STATES PATENT OFFICE.

CIRTHBERT C. MUNROE, OF BOSTON, MASSACHUSETTS.

THlLL-COUPLING.

SPECIFICATION forming part of Letters Patent No. 405,108, dated June 11,1889.

Application filed March 30, 1889- Serial No. 305,383. (No model.)

To all whom it 11mg concern.-

Be it known that I, OIRTHBERT O. MUNROE, a citizen of Canada, and aresident of Boston, in the county of Suffolk and State of Massachusetts,have invented new and useful Improvements in Thill-Couplings, of whichthe following, taken in connection with the accompanying drawings, is aspecification.

This invention relates to improvements in thill-couplings; and it iscarried out as follows, reference being had to the accompanyingdrawings, wherein- Figure 1 represents a plan View of the invention.Fig. 2 represents a longitudinal section on the line X X shown inFig. 1. Fig. 3 represents a detail plan view of the shaft-iron, and Fig.4. represents a cross-section on the line Y Y shown in Fig. 2.

Similar letters refer to similar parts wherever they occur on thedifferent parts'of the drawings.

a represents the carriage-axle, as usual, to

which is secured the clasp b, having the downwardly projecting screws b19, passing through perforations in the yoke c and provided with nuts I)b by means of which the axle, clasp, and yoke are firmly securedtogether.

d represents the shaft-iron, having a forked end d, to which is secured,or made in one piece with, the ball d, as shown in detail in Fi 3.

E 1 61 are cylindrical journals or trunnions connecting the said ball cwith the forked end (1 of the shaft-iron d, as shown in said Fi 3.

l n one piece with the yoke c is made the ball-bearing c', adapted toreceive the ball d".

of the shaft-iron, and e is a detachable ballbearing cap adapted to fitagainst the rear portion of the said shaft-iron ball (1 as shown. Saidcap may be made of hard rubber, metal, or other suitable material,without departing from the essence of my invention.

0" c" are guide-ribs on the yoke 0, between which the under side of thecap-piece e is guided, as shown in Fig. 4. The cap e is secured to theyoke c by means of the screwbolt f, passing loosely through aperforation in the cap 6 and screwed through the yoke, which at thisplace is preferably made of increased thickness, as shown in Figs. 2 and4. f is a check=nut on the lower projecting end of the screw-bolt f forthe purpose of preventing said bolt from working loose.

The screw-bolt f is arranged inclined to the yoke c, as shown in Fig. 2,so as to cause the cap e to be forced against the rear portion of theshaft-iron ball d with a proper frictional resistance, and thuspreventing the coupling from rattling while in'use.

By adjusting the position of the inclined screw f the wear on the balland ball-joint may be taken up from time to time as may be needed toprevent rattling and to obtain the necessary frictional resistancebetween the ball and its ball-bearing.

The invention is very simple in construction, is composed of very fewparts, and by its use a proper connection is established between theshaft-iron and the axle and all rattling and consequent unnecessary wearof the jointed parts prevented.

Having thus fully described the nature, construction, and operation ofmy invention, I

wish to secure by Letters Patent, and claim-

